Call for testers: Atheros AR8121(L1E)/AR8113/AR8114(L2E) ethernet

Josh Carroll josh.carroll at
Thu Dec 11 19:51:25 PST 2008

> I guess it's caused by flow-control frames.
> The flow-control feature is disabled in most drivers as mii(4)
> layer still lacks the feture. ale(4) has flow-control support code
> but it is in disabled state. When mii(4) is ready to handle
> flow-controls ale(4) may work better.
> em(4) does not rely on mii(4) layer so it implemented flow-controls
> in driver. You can check flow-control satus of em(4) with
> "sysctl dev.em.0.stats=1"(See XON/XOFF).

Hmm, any idea why my previous motherboard (P5K-E) which had an msk(4)
worked ok without the stuttering for this streaming? I believe it
relies on mii as well, right?

Thanks, I guess I'll stick with the em(4) PCI card, at least until I
can get a PCI-E em(4). :)


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